Diagnostic Procedure
WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC PROCEDURES - ENGINE WILL NOT CRANK
| TEST | ACTION | APPLICABILITY |
|---|---|---|
| 1 | Turn the ignition off.
NOTE:
The battery must be fully charged before diagnosing a no crank condition. Inspect the battery cables for corrosion, looseness or other problems. Is there evidence of problems? Yes --> Repair as necessary. Perform NO START VERIFICATION - VER-1 . No --> Go To 2 |
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| 2 | Turn the ignition on. With the DRBIII®, read the SKIM DTCs. Does the DRBIII® display any SKIM DTCs? Yes --> Refer to appropriate test for problems related to SKIM. Perform NO START VERIFICATION - VER-1 . No --> Go To 3 |
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| 3 | Is the vehicle equipped with an automatic transmission? Yes --> Go To 4 No --> Go To 9 |
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| 4 | Turn the ignition off. Remove the Starter Relay from the PDC.
WARNING:
THE TRANSMISSION MUST BE IN PARK/NEUTRAL AND THE PARK BRAKE MUST BE SET FOR THIS TEST.
WARNING:
THE ENGINE MAY CRANK IN THE NEXT STEP. WHEN THE ENGINE IS CRANKING, DO NOT STAND IN A DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING. Momentarily jumper Starter Relay connector cavities 30 and 87 in the PDC connector. Did the engine crank? Yes --> Go To 5 No --> Go To 14 |
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| 5 | Turn the ignition off. Place the transmission in Park or Neutral. Remove the Starter Relay from the PDC. Using a 12-volt test light connected to ground, check the Ignition Switch Start Output circuit while turning the ignition switch to the START position. Does the test light illuminate with the ignition switch in the START position? Yes --> Go To 6 No --> Repair the Ignition Switch Start Output circuit for an open. Perform NO START VERIFICATION - VER-1 . |
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| 6 | Turn the ignition off. Remove the Starter Relay from the PDC. Install a substitute relay in place of the Starter Relay. Attempt to start the engine. Does the engine crank? Yes --> Replace the Starter Relay. Perform NO START VERIFICATION - VER-1 . No --> Go To 7 |
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| 7 | Turn the ignition off. Disconnect the P/N Switch harness connector. Connect a jumper wire across the P/N Switch harness connector. Attempt to start the engine. Does the engine crank? Yes --> Replace the Park/Neutral Switch in accordance with the Service Information. Perform NO START VERIFICATION - VER-1 . No --> Go To 8 |
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| 8 | Turn the ignition off. Disconnect the P/N Switch harness connector. Using a 12-volt test light connected to 12-volts, check the Ground circuit at the P/N Switch harness connector. Does the test light illuminate brightly? Yes --> Repair the P/N Switch Sense circuit for an open between the P/N Switch and the ECM harness connector. Perform NO START VERIFICATION - VER-1 . No --> Repair the P/N Switch Ground circuit for an open. Perform NO START VERIFICATION - VER-1 . |
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| 9 | Turn the ignition off. Remove the Starter Relay from the PDC.
WARNING:
THE TRANSMISSION MUST BE IN NEUTRAL AND THE PARK BRAKE MUST BE SET FOR THIS TEST.
WARNING:
THE ENGINE MAY CRANK IN THE NEXT STEP. WHEN THE ENGINE IS CRANKING, DO NOT STAND IN A DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING. Momentarily jumper Starter Relay connector cavities 30 and 87 in the PDC connector. Did the engine crank? Yes --> Go To 10 No --> Go To 14 |
All |
| 10 | Remove the Starter Relay from the PDC. Using a 12-volt test light connected to ground, check the Ignition Switch Start Output circuit while fully depressing the clutch pedal and turning the ignition switch to the START position. Does the test light illuminate with the ignition switch in the START position? Yes --> Go To 11 No --> Go To 12 |
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| 11 | Turn the ignition off. Remove the Starter Relay from the PDC. Install a substitute relay in place of the Starter Relay. Attempt to start the engine. Does the engine crank? Yes --> Replace the Starter Relay. Perform NO START VERIFICATION - VER-1 . No --> Repair the Starter Relay Ground Circuit for an open. Perform NO START VERIFICATION - VER-1 . |
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| 12 | Turn the ignition off. Remove the Starter Relay from the PDC. Disconnect the Clutch Interlock Switch harness connector. Connect a jumper wire across the Clutch Interlock Switch harness connector. Using a 12-volt test light connected to ground, check the Ignition Switch Start Output circuit at the Starter Relay connector in the PDC and turning the ignition switch to the Start position. Does the test light illuminate with the ignition switch in the Start position? Yes --> Replace the Clutch Interlock Switch. Perform NO START VERIFICATION - VER-1 . No --> Go To 13 |
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| 13 | Turn the ignition off. Disconnect the Clutch Interlock Switch harness connector. Remove the Starter Relay from the PDC. Measure the resistance of the Clutch Interlock Switch Output circuit between the PDC and the Clutch Interlock Switch harness connector. Is the resistance below 10.0 ohms? Yes --> Repair the Ignition Switch Start Output circuit to the Clutch Interlock Switch. Perform NO START VERIFICATION - VER-1 . No --> Repair the Clutch Interlock Switch Output circuit for an open. Perform NO START VERIFICATION - VER-1 . |
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| 14 | Remove the Starter Relay from the PDC. Using a 12-volt test light connected to ground, check the Fused B+ circuit in the Starter Relay connector in the PDC. Is the test light on? Yes --> Go To 15 No --> Repair the Fused B(+) circuit for an open. Perform NO START VERIFICATION - VER-1 . |
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| 15 | Turn the ignition off. Remove the Starter Relay from the PDC. Disconnect the Starter Relay Output wire from the Starter Solenoid. Connect the Starter Relay Output wire (at the Starter) to ground. Using a 12-volt test light connected to 12-volts, check the Starter Relay Output circuit at the Starter Relay connector in the PDC. Does the test light illuminate brightly? Yes --> Go To 16 No --> Repair the Starter Relay Output circuit for an open. Perform NO START VERIFICATION - VER-1 . |
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| 16 | Using the Service Information, check the battery cables for high resistance. Did either battery cable have a voltage drop greater than 0.2 volts? Yes --> Replace the battery cable(s). Perform NO START VERIFICATION - VER-1 . No --> Go To 17 |
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| 17 | Turn the ignition off. Attempt to manually rotate the crankshaft 360°. Is the crankshaft able to rotate 360°? Yes --> Replace the Starter Motor. Perform NO START VERIFICATION - VER-1 . No --> Repair the engine mechanical problem. Perform NO START VERIFICATION - VER-1 . |
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